Frontiers Mineral Carbonation of Phosphogypsum Waste for
· Introduction Phosphogypsum PG is a waste material generated during production of phosphoric acid H 3 PO 4 from phosphate rock rich in apatite [Ca 5 PO 4 3 OH] via reaction with sulfuric acid H 2 SO 4 Chemically PG consists primarily of calcium sulfate dihydrate CaSO 4 ·2H 2 O Table 1 Worldwide 100 280 Mt/year PG is produced 85% of